rigvelaPC powers on but has no display: a troubleshooting order
Spinning fans and lighting show that part of the system receives power. They do not confirm that the processor, memory and graphics card have completed startup. Begin with external connections, then change one thing at a time. This sequence is for a desktop PC; use the manufacturer's service instructions for laptops and proprietary prebuilt systems.
Checklist as text
You can select and copy this text manually. The list does not mark any checks as completed.
On this page
Is the monitor powered and is the correct input selected?
Which video output is the cable connected to, and can that output work with this build?
What does the motherboard diagnostic indicate according to its manual?
This is a checking order, not an automatic diagnosis. Isolate power as instructed before moving internal components.
Identify the symptom and stop for warning signs
Record whether the monitor says No signal, stays black, shows the board logo, or loses the picture when Windows starts. If BIOS is visible first, investigate the later operating-system or driver stage separately.
Stop testing if you notice smoke, a burning smell, sparks or visible damage. Switch off and disconnect mains power if safe to do so. Never open the power supply; it has no user-serviceable internal parts. Before touching components, shut down, unplug the PC and follow the board manual's instructions for removing standby power.
Check the monitor, cable and correct output
Open the monitor menu and select the connected input. Reconnect both cable ends. Try a known-working cable directly, without adapters or docks. If possible, check the monitor with another source before dismantling the PC.
With a dedicated graphics card installed, start with an output on that card. A motherboard output is useful only when the exact processor includes integrated graphics and the board supports that output. Processor families can contain models with different graphics capabilities; suffixes matter. An HDMI socket on the motherboard alone does not establish that it can produce a picture.
Inspect power connections without guessing cables
With mains power disconnected, compare the motherboard's main power connection, CPU power and required GPU power connections with their manuals. Fan movement is not evidence that the PSU is healthy. CPU EPS and graphics-card PCIe connectors serve different purposes; do not force a connector that does not belong in a socket.
Use only modular cables officially compatible with the exact PSU. Similar connectors can have different pin assignments. Inspect for incomplete insertion, misalignment and damage. Find the instructions instead of borrowing an uncertain cable from another supply.
Check memory and allow training to finish
After memory replacement or some setting changes, the board may train memory before producing a picture, sometimes restarting during the process. Expected behaviour and duration depend on the platform and BIOS. Follow the specific board's instructions; there is no universal one-minute rule. Avoid repeated forced shutdowns while a documented training process is still underway.
If startup never completes, disconnect power and check module seating and the recommended DIMM slots. Even a one-module test has a preferred slot specified in the manual. Test modules individually under the same conditions and record the results. Leave XMP or EXPO disabled while investigating whether the system can start with a basic memory configuration.
Collect evidence before replacing hardware
Photograph persistent diagnostic lights or codes and consult the exact manual. DRAM, CPU or VGA identifies a direction for investigation, not a proven failed part. Briefly changing lights during startup may be normal.
Check the exact CPU against the motherboard's support list and its minimum BIOS requirement. Do not make a firmware update or CMOS reset your first action: understand the procedure, consequences and recovery options first. If basic checks do not help, give support your component list, connection photos, diagnostic indication and a record of the tests already attempted.
What RigVela can check
Add the exact CPU, board, memory, graphics card and PSU to RigVela. Specification checks can highlight platform conflicts, memory mismatches or missing integrated graphics.
To find a hardware fault, continue diagnosis using the board manual. RigVela cannot read BIOS, test component health or confirm POST. Leave an unknown model unresolved.
Quick checklist
- Exact symptom recorded and monitor input selected.
- Video cable connected to an output the system can use.
- Power connections and DIMM slots checked against manuals.
- Diagnostic indication recorded without declaring an unproven failure.
Check the parts list after troubleshooting
Use the model list to look for socket, memory, size and power conflicts. The list checker cannot identify a faulty component.
Documentation & sources
These are the documents used in this guide. Check your exact model’s specifications on its support page.